Water boiler



April 1930- I H. HARGREAVES 1,752,905

WATER BOILER Filed Dec. 30, 1926 Patented Apr. 1, 1930 (J U ED STAT-ES PATENT-OFFICE HAROLD HARGREA VES, OF 'BURNLEY, ENGLAND, v ASS IG-N OR TO JACKSON BOILERS a LIMITED, OF LEEDS, ENGLAND, A BBITISH COMIPANY WATER BOILER Application fired ne ate; 30,1926, Seria 1 No. 158,Q42, and. in Great Britain A ril 13, 1926. I

This invention relates to water boilers, preferably self-feeding, of the type in which the water from a boiling chamber or interior is delivered up an expansion, pipe into a*c'ollecting'or expansion'box or'chambe'r to iwhi'cjhis connected a draw off" tap or the like, "antljhasfor its object to provide improved means" forj quickly and positively emptying thecollecting or expansionbox of any water remaining therein when the supplyfrom the "expansion pipe ceases. g V r Previously small weepmgholes'have been 'provided in the bottom of the collectlng or expansionbox for the purpose of emptying this boxpbutas they 'arenecessa'rily-smallyvarip understood it will now be" described with ojusjjdevices have been employed. for keeping V themsclea'r of fur flakes, from becoming f furrd or otherwise obstructed. The water passing through the :weepi'ng' holes in '4 previous constructionshas gone directto the bulkwater supply chamber usual with this kind ofj boiler whichgenerallyis 'in the form fof'a n outerannularjcase; The size "of the weeping hole has necessarily been kept as J gtifsmall as possible," :lfo'r ftheyfweretoo large the bulk "or theboiling water delivered by the expansion pipe to the collecting or expansion'bo'x would merely; run back to'the bulkwater supply chamber-instead ofout of .30 the draw off tapor the/like; w l i i the present inven- *In general accordingto, ftion means are provided for connectingthe j weepingf hole with the 'expansion pipe or boiling chamber, which meansfimay comprise .35 a tube or other suitable fitting.

v Inzthis way when boiling water isbeing deliveredinto the'collecting' or expansion box by; the expansion pipeit is also being caused" Ito enter by the weepinghole a conse 1" quence it will be obvious thatthe' water does not run outof the .weepinghole 'simultaneonly with ,thedeliVery intO the collecting or expansion box and; so amuch larger weep-' inghole can be'rised. Thisiquicklyempties 4 the said collecting box when'the supply from thez boiling chamber ceases. The"weeping hole wh boiling chamber. or interior may. be connected to theupper portion thereof or, maybe con-V 1 nected to a point lower down. Instead of n connected to the 7 having a separate weeping hole; the expansion pipe in place of being connected to the expansion or collecting. box some distance "above the bottom in'the, usual manner, may

maining in thebox immediately falls down the expansion pipe. "In this'way the opening of the expansion pipe intothe expansion or collecting box forms theweeping hole and the expansion pipe itself forms the connection from the weeping hole to the interior or boiling chamber.

- Inorder that the inventio'n 'may be better reference. to the accompanying drawings in Fig. 1 is an elevation-partly in section of one form of self feeding water boiler constructed according to one method of carrying the invention into eifect. V 1 Fig. 2 is a similar ViewtoF-ig. 1 but showing another embodiment of the invention.

Fig. 3 is a plan of thejexpan sion or collect ing box and connections of the form of the invention shown in F ig. 2.

4 shows somewhat diagrammatically a sectional elevation of theupper portion of a so-callecl fountaintype of boiler with the invention applied thereto, and according to another method effect. p g v Fig. 5 showssomewhat' diagrammatically of carrying the invention into the upper portion of another boiler illus- Q tion. I p

Fig. 6 is a detail elevation, partly in sectrating a further embodimentof theinven- 'tion,of the tank'and its controlling float and inlet and overflow openings.

v The water boller shown herein is used for obtaining quick suppliesof. boiling water in restaurants, tearshops and other similar places and it is imperative when the outlet tap 11 is turned on the boiling water should be supplied immediately."

The boiler c'omprisesflaniouter jacket 6 which is 'fed' automatically from a tank: 7 which comprises an automatic supply valve such for example as a float valve'29 controlled by float 26. Said tank also has an overflow opening 27 and an inlet opening 28. Said float operates an inlet controlling valve 29. The boiler further comprises an inner boiling chamber 8 connected at its lowerend with the jzioktfi. The leyel int he chamber 8 and jacket 6 is kept constant by the supply from the cistern 7 and this level comes just about at thehase of the'expansionand' bubbling box or collecting chamber 10. The water is heated by means of a gas ring (not shown) or the like at the lower part thereof beneath the boilingchamber 8 the gas supply being controlled by gas vhlve the handle of which is operated to turn the gas onwhen the tap 11 is open and when the tap. 11 is closed to lower the gas; The boiling watdr b-y expansion and ebullition rises up t 1e pipe ,9 4 i l l .1 l l i I vi 1 milieu the expunsion pipe and; enters the collecting chamber 10 from which it passes to the tap 11. a I

A defect of thearraiigement described is that when the ll is closed a certain amount of boiling water remainsin the collectiiig chamber 19. Thislbecoines cooierand when the tap 11 isagain opened it lowers the temperature of the next siipply of boiling water passing up the pipe9 into the chainber 10, and as a consequence the first'partof the su ply when theta p ll is turned on is below oiling oint.

i It therefore ecame imperative that nieans should be devised for draining away w ater remaining inthe collecting chamber l'O after the tap 11 was closed; for t is ose small holes or a smallholehavegbeenp prem e made inthe lower portion ofthe chamber 10 termed we'eping holes. As thesew'eping vised for them "clear of encrustation or flakes of fur or the like V Accordin to ny i vention a i restate "the Weeping ho e at the lower portion of the collectin boxer chamber to the boiling chamber directTy by suitableineans such as a pipe or the like or through the actuall expafnsion pipe as hereinafter described and claimed;

The upper portion of the boiling chamber or interior 8 is connectedto the expansion pipe 9 by a conical member 12 which "carries by means of an apertured plate or spider 13 a the upper open end 14 of a. displacer 16 med e one 17611 enew ai le a cylinder 18 on theexte rior and with an open lower end 19 o f' largeir siz e than the e e'ntincreaseldvelocity is given to th mes passing upwards therethrough during the boilr 0 t e a i the 'e ieis t-fit ii to the cone 18. The waten passingfthrough the aperturesin the l EXa lso increases the velocity and the increasing velocity general- 1 y sets up turbulences greatier 'fthan hitherto in the irregular portions of th e chamber 8 and finally the conical member 12 further cock 11 isopeiian'd boiling the wee ing?hoiejeogeamesget t e east end directly; into the ,shown infEi'g's. read 2. 'In th means of a pipe 21 with the interior of the boiling chamber 8. Although the drawing 'sh'owsthe pipe sieahiietel weheap per portionot the chamber 8 it may be connected lowloi n i a y qi i Pdsi 'fiiefi p In seeds itfw ll be .fiiiaersteea use an boiling wiiter left it the refs 10 w'hntIie emerges 7 1i' siedeauw s w r the weeping hole flb ifitotlie'pip bilme har b a fi rias' h r new 20 is pr comparativelyhtrl' e'siie, the water winipas's away qeielhy fissure; t ri t if i a i up the expansiespi ae ew 112; expairs eiibdx s will be readily undrstoodjtli'atffitiiiing water the -21 thus greater delivery t'oft 12; basic is'a ssiifd.

the xpensi entes ro mesa- :15 m; hol 20 5. a. comes towardsbiie'fi'dioi it x10 while 11 is located 's'ubstantiafiy midway between he bpe h 2 m 0- To facilitate ole I J is provided at the elbow of the expansion pipe 9?. This pmg is se arian pesieee bys ie expansion pipe and parts 'onnectd'therto w t e ms-1e pipe" ae iiverypqfmessages .4. \i it: Mk1 '1\ 14,r l i i H mg chamber or interior to the expans onbox deliver boilin water act" to artin tli"exno. .m lrgi so pansion box or co lector Q being app i t o ,1: .50 r it isja'p lied it'd ai pp i? k r. v V uMlkuu) him win 1 1 be seen" that the e xp an s onf p pe fi lfoi a shape and connected to wrapper pdr't'ionof e-e eseetiepragai the boiling chamber by means of an, elbow or the like 25. The collecting chamber is indicated at 10. The form of the invention shown in Fig. 5 acts in exactly the same manner as that described with reference to Fig. 4.

Although the particular forms of the invention shown in the drawings are applied to boilers with gas heating means, it is obvious that boilers with other heating means such for example as electrically heated may also be constructed according to the invention.

The invention is not limited to the particular forms or details of construction described as these may be varied to suit particular cases.

What I claim and desire to secure by Letters Patent of the United States of America 1s In apparatus of the class described, a boiler comprising an outer water jacket and an interiorly arranged boiling chamber, an expansion pipe leading upwardly from said boiling chamber, a collector into which the expansion-pipe discharges, said collector being provided with a tap, and a duct of restricted capacity connecting the lower portion of the collector to the boiling chamber and means to supply said outer water jacket with water.

In witness whereof I aifix my signature.

- HAROLD HARGREAVESL 

